Black Sponge

[ReefPnott]

This black looking sponge is suffocating my zoas and ricordea mushrooms, any idea how to get rid of it?

 

[mumra]

If you can take out the ro k that it's on I'd do that and pick it off or scrub it with a wire brush. Be sure to wear PPE if you do. IDK, if a sponge can be harmful or not but it's worth mitigating the risk.